Modular fuel injector having a low mass, high efficiency...

Details Modular fuel injector having a low mass, high efficiency... Modular fuel injector having a low mass, high efficiency...

2005-02-08

2005-02-08

Hwu, Davis (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Including valve means in flow line

Reciprocating

C239S585300, C239S585500, C239S533300, C239S600000, C239S005000

Reexamination Certificate

active

06851631

ABSTRACT:
A fuel injector for use with an internal combustion engine. The fuel injector comprises a valve group subassembly and a coil group subassembly. The valve group subassembly includes a tube assembly having a longitudinal axis that extends between a first end and a second end; a seat that is secured at the second end of the tube assembly and that defines an opening; an armature assembly that is disposed within the tube assembly; a member that biases the armature assembly toward the seat; an adjusting tube that is disposed in the tube assembly and that engages the member for adjusting a biasing force of the member; a filter that is located at the first end of the tube assembly and that has an integral retaining portion; an O-ring that circumscribes the first end of the tube assembly and that is maintained by the retaining portion of the filter; and a first attachment portion. The coil group subassembly includes a solenoid coil that is operable to displace the armature assembly with respect to the seat; and a second attachment portion that is fixedly connected to the first attachment portion.

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Composite photograph (11in. by 17 in.) of cross-sectional view of fuel injector entitled “Sagem Short Injector,” Oct. 1999.
Composite photograph (11in. by 17 in.) of cross-sectional view of fuel injector entitled “Bosch EV12 Injector,” Oct. 1999.
Composite photograph (11in. by 17 in.) of cross-sectional view of fuel injector entitled “Bosch EV6 Injector,” Oct. 1999.
Composite photograph (11in. by 17 in.) of cross-sectional view of fuel injector entitled “Multec II Injector,” Oct. 1999.
Composite photograph (11in. by 17 in.) of cross-sectional view of fuel injector entitled “Pico Injector,” Oct. 1999.
Composite photograph (11in. by 17 in.) of cross-sectional view of fuel injector entitled “Aisan Injector,” Oct. 1999.

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